Hi,
I wonder could you help me regarding a model for tumour growth inhibition. I am trying to use an indirect model as detailed in a paper by Laurent Salphati - http://dmd.aspetjour...36.full.pdf htm -but I am not having much success and would really appreciate some help identifying where I have gone wrong. Many thanks in advance.
the model I have is
test(){
deriv(Aa = - Ka * Aa)
deriv(A1 = Ka * Aa - Cl * C)
deriv(E = (kng * E) - (K * E))
dosepoint(Aa)
K=Kmax * C/KC50 + C
C = A1 / V
sequence{E = kng / K}
error(EEps = 1)
observe(EObs = E + EEps)
stparm(kng = tvkng)
stparm(K = tvK)
stparm(Kmax = tvKmax)
stparm(KC50 = tvKC50)
fixef(Ka(freeze) = c(, 0.427, ))
fixef(V(freeze) = c(, 439, ))
fixef(Cl(freeze) = c(, 135.2, ))
fixef(tvkng = c(, 25, ))
fixef(tvK = c(, 0.33, ))
fixef(tvKmax = c(, 0.76, ))
fixef(tvKC50 = c(, 1050, ))
}
I have a data sheet with time and tumour volume, and a dose sheet with dose for 14days of dosing.
"The error I get is as follows
Could not merge sort times
Some data that is expected to be numeric is not
Please check your source data"
I think this is becasue Aa rate appears in the dose sheet and I am not sure what to fill in here as the dose regimen is oral QD for 14 days.
Any help most welcome of if you have a model I could use which does this already.
kind regards
Anne